Actual source code: dmouse.c
petsc-3.12.5 2020-03-29
2: /*
3: Provides the calling sequences for all the basic PetscDraw routines.
4: */
5: #include <petsc/private/drawimpl.h>
7: /*@
8: PetscDrawGetMouseButton - Returns location of mouse and which button was
9: pressed. Waits for button to be pressed.
11: Collective over PetscDraw
13: Input Parameter:
14: . draw - the window to be used
16: Output Parameters:
17: + button - one of PETSC_BUTTON_LEFT, PETSC_BUTTON_CENTER, PETSC_BUTTON_RIGHT, PETSC_BUTTON_WHEEL_UP, PETSC_BUTTON_WHEEL_DOWN
18: . x_user, y_user - user coordinates of location (user may pass in NULL).
19: - x_phys, y_phys - window coordinates (user may pass in NULL).
21: Notes:
22: Only processor 0 actually waits for the button to be pressed.
24: Level: intermediate
25: @*/
26: PetscErrorCode PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
27: {
28: PetscReal bcast[4] = {0,0,0,0};
34: *button = PETSC_BUTTON_NONE;
35: if (!draw->ops->getmousebutton) return(0);
37: (*draw->ops->getmousebutton)(draw,button,x_user,y_user,x_phys,y_phys);
39: MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw));
40: if (x_user) bcast[0] = *x_user;
41: if (y_user) bcast[1] = *y_user;
42: if (x_phys) bcast[2] = *x_phys;
43: if (y_phys) bcast[3] = *y_phys;
44: MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw));
45: if (x_user) *x_user = bcast[0];
46: if (y_user) *y_user = bcast[1];
47: if (x_phys) *x_phys = bcast[2];
48: if (y_phys) *y_phys = bcast[3];
49: return(0);
50: }